The Officer's Manual

In the meantime, this attempt of the enemy having convinced the French general of the danger to which his bridge had exposed him, removed it nearer to that of Strasburg, in order to diminish the extent of ground he had to defend.

Montécuculli, having commanded the magistrates of Strasburg to collect materials for a bridge, moved to Scherzheim to receive them; but Turenne again defeated his projects by taking a position at Freistett, where he occupied the islands of the Rhine, and immediately constructed a stockade.

Thus it was that, during the whole of this campaign, Turenne succeeded in gaining the initiative of the enemy, and obliging him to follow his movements. He succeeded, also, by a rapid march, in cutting off Montécuculli from the Town of Offenburg, whence he drew his supplies, and would no doubt have prevented the Austrian general from effecting his junction with the corps of Caprara, had not a cannon-shot terminated this great man’s life.

MAXIM XVIII

A general of ordinary talent occupying a bad position, and surprised by a superior force, seeks his safety in retreat; but a great captain supplies all deficiencies by his courage, and marches boldly to meet the attack. By this means he disconcerts his adversary; and if the latter shows any irresolution in his movements, a skilful leader, profiting by his indecision, may even hope for victory, or at least employ the day in manœuvring – at night he entrenches himself, or falls back to a better position. By this determined conduct he maintains the honor of his arms, the first essential to all military superiority.

NOTE

In 1653, Marshal Turenne was surprised by the Prince of Condé, in a position where his army was completely compromised. He had the power, indeed, by an immediate retreat, of covering himself by the Somme, which he possessed the means of crossing at Peronne, and whence he was distant only half a league; but, fearing the influence of this retrograde movement on the morale of his army, Turenne balanced all disadvantages by his courage, and marched boldly to meet the enemy with very inferior forces. After marching a league, he found an advantageous position, where he made every disposition for a battle. It was three o’clock in the afternoon; but the Spaniards, exhausted with fatigue, hesitated to attack him, and Turenne having covered himself with entrenchments during the night, the enemy no longer dared to risk a general action, and broke up his camp.

MAXIM XIX

The transition from the defensive to the offensive is one of the most delicate operations.

NOTE

By studying the first campaign of Napoleon in Italy, we can learn what genius and boldness may effect in passing with an army from the defensive to the offensive. The army of the allies, commanded by General Beaulieu, was provided with every means that could render it formidable. Its force amounted to eighty thousand men, and two hundred pieces of cannon. The French army, on the contrary, could number scarcely thirty thousand men under arms, and thirty pieces of cannon. For some time there had been no issue of meat, and even the bread was irregularly supplied. The infantry was ill clothed, the cavalry wretchedly mounted. All the draught-horses had perished from want, so that the service of the artillery was performed by mules. To remedy these evils, large disbursements were necessary; and such was the state of the finances, that the government had only been able to furnish two thousand louis in specie for the opening of the campaign. The French army could not possibly exist in this state. To advance or retreat was absolutely necessary. Aware of the advantage of surprising the enemy at the very outset of the campaign by some decisive blow, Napoleon prepared for it by recasting the morale of his army.

In a proclamation full of energy, he reminded them that an ignoble death alone remained for them, if they continued on the defensive; that they had nothing to expect from France, but everything to hope from victory. “Abundance courts you in the fertile plains of Italy,” said he; “are you deficient, soldiers, in constancy or in courage?” Profiting by the moment of enthusiasm which he had inspired, Napoleon concentrated his forces in order to fall with his whole weight on the different corps of the enemy. Immediately afterward, the battles of Montenotte, Milesimo, and Mondovi, added fresh confidence to the high opinion already entertained by the soldier for his chief; and that army which only a few days ago was encamped amid barren rocks, and consumed by famine, already aspired to the conquest of Italy. In one month after the opening of the campaign, Napoleon had terminated the war with the King of Sardinia, and conquered the Milanese. Rich cantonments soon dispelled from the recollection of the French soldier the misery and fatigue attendant on this rapid march, while a vigilant administration of the resources of the country reorganized the materiel of the French army, and created the means necessary for the attainment of future success.

MAXIM XX

It may be laid down as a principle, that the line of operation should not be abandoned; but it is one of the most skilful manœuvres in war, to know how to change it, when circumstances authorize or render this necessary. An army which changes skilfully its line of operation deceives the enemy, who becomes ignorant where to look for its rear, or upon what weak points it is assailable.

NOTE

Frederick sometimes changed his line of operation in the middle of a campaign; but he was enabled to do this, because he was manœuvring at that time in the centre of Germany – an abundant country, capable of supplying all the wants of his army in case his communications with Prussia were intercepted.

Marshal Turenne, in the campaign of 1746, gave up his line of communication to the allies in the same manner; but, like Frederick, he was carrying on the war at this time in the centre of Germany, and having fallen with his whole forces upon Rain, he took the precaution of securing to himself a depôt upon which to establish his base of operation.

By a series of manœuvres, marked alike by audacity and genius, he subsequently compelled the imperial army to abandon its magazines, and retire into Austria for winter quarters.

But these are examples which it appears to me should only be imitated when we have taken full measure of the capacity of our adversary, and above all, when we see no reason to apprehend an insurrection in the country to which we transfer the theatre of war.

MAXIM XXI

When an army carries with it a battering train, or large convoys of sick and wounded, it cannot march by too short a line upon its depôts.

NOTE

It is above all in mountainous countries, and in those interspersed with woods and marshes, that it is of importance to observe this maxim; for, the convoys and means of transport being frequently embarrassed in defiles, an enemy by manœuvring may easily disperse the escorts, or make even a successful attack upon the whole army, when it is obliged, from the nature of the country, to march in an extended column.

MAXIM XXII

The art of encamping in position is the same as taking up the line in order of battle in this position. To this end, the artillery should be advantageously placed, ground should be selected which is not commanded or liable to be turned, and, as far as possible, the guns should cover and command the surrounding country.

NOTE

Frederick has remarked that, in order to be assured that your camp is well placed, you should see if, by making a small movement, you can oblige the enemy to make a greater; or, if after having forced him to retrograde one march you can compel him to fall back another.

In defensive war, all camps should be entrenched in the front and wings of the position they occupy, and care should be taken that the rear is left perfectly open. If you are threatened with being turned, arrangements should be made beforehand for taking up a more distant position; and you should profit by any disorder in the enemy’s line of march, to make an attempt upon his artillery or baggage.

MAXIM XXIII

When you are occupying a position which the enemy threatens to surround, collect all your force immediately, and menace him with an offensive movement. By this manœuvre, you will prevent him from detaching and annoying your flanks in case you should judge it necessary to retire.

NOTE

This was the manœuvre practised by General Desaix, in 1798, near Radstadt. He made up for inferiority in numbers by audacity, and maintained himself the whole day in position in spite of the vigorous attacks of the Archduke Charles. At night he effected his retreat in good order, and took up a position in the rear.

It was in accordance, also, with this principle, in the same campaign, that General Moreau gave battle at Biberach, to secure his retreat by the passes of the Black mountains. A few days after, he fought at Schliengen with the same object. Placed in a good defensive position, he menaced the Archduke Charles by a sudden return to the offensive, while his artillery and baggage were passing the Rhine by the bridge of Huningen, and he was making all the necessary arrangements for retiring behind that river himself.

Here, however, I would observe, that the execution of such offensive demonstrations should be deferred always till toward the evening, in order that you may not be compromised by engaging too early in a combat which you cannot long maintain with success.

Night, and the uncertainty of the enemy after an affair of this kind, will always favor your retreat, if it is judged necessary; but, with a view to mask the operation more effectually, fires should be lighted all along the lines, to deceive the enemy and prevent him from discovering this retrograde movement, for in a retreat it is a great advantage to gain a march upon your adversary.

MAXIM XXIV

Never lose sight of this maxim: that you should establish your cantonments at the most distant and best-protected point from the enemy, especially where a surprise is possible. By this means you will have time to unite all your forces before he can attack you.

NOTE

In the campaign of 1745, Marshal Turenne lost the battle of Marienthal, by neglecting this principle; for if, instead of reassembling his divisions at Erbsthausen, he had rallied his troops at Mergentheim, behind the Tauber, his army would have been much sooner reunited; and Count Merci, in place of finding only three thousand men to fight at Erbsthausen (of which he was well informed), would have had the whole French army to attack in a position covered by a river.

Some one having indiscreetly asked Viscount Turenne how he had lost the battle of Marienthal: “By my own fault,” replied the marshal; “but,” added he, “when a man has committed no faults in war, he can only have been engaged in it but a short time.”

MAXIM XXV

When two armies are in order of battle, and one has to retire over a bridge, while the other has the circumference of the circle open, all the advantages are in favor of the latter. It is then a general should show boldness, strike a decided blow, and manœuvre upon the flank of his enemy. The victory is in his hands.

NOTE

This was the position of the French army at the famous battle of Leipzig, which terminated the campaign of 1813 so fatally for Napoleon; for the battle of Hanau was of no consequence, comparatively, in the desperate situation of that army.

It strikes me that, in a situation like that of the French army previous to the battle of Leipzig, a general should never calculate upon any of those lucky chances which may arise out of a return to the offensive, but that he should rather adopt every possible means to secure his retreat. With this view, he should immediately cover himself with good entrenchments, to enable him to repel with inferior numbers the attack of the enemy, while his own equipments are crossing the river. As fast as the troops reach the other side, they should occupy positions to protect the passage of the rear guard, and this last should be covered by a tête de pont as soon as the army breaks up its camp. During the wars of the Revolution, too little regard was paid to entrenchments; and it is for this reason we have seen large armies dispersed after a single reverse, and the fate of nations compromised by the issue of one battle.

MAXIM XXVI

It is contrary to all true principle, to make corps, which have no communication with each other, act separately against a central force whose communications are cut off.

NOTE

The Austrians lost the battle of Hohenlinden by neglecting this principle. The imperial army, under the orders of the archduke John, was divided into four columns, which had to march through an immense forest, previous to their junction in the plain of Anzing, where they intended to surprise the French. But these different corps, having no direct communication, found themselves compelled to engage separately with an enemy who had taken the precaution of concentrating his masses, and who could move them with facility in a country with which he had been long previously acquainted.

Thus the Austrian army, enclosed in the defiles of the forest with its whole train of artillery and baggage, was attacked in its flanks and rear, and the archduke John was only enabled to rally his dispersed and shattered divisions under cover of the night.

The trophies obtained by the French army on this day were immense. They consisted of eleven thousand prisoners, one hundred pieces of cannon, several stand of colors, and all the baggage of the enemy.

The battle of Hohenlinden decided the fate of the campaign of 1800, and Moreau’s brilliant and well-merited success placed him in the rank of the first general of the age.

MAXIM XXVII

When an army is driven from a first position, the retreating columns should rally always sufficiently in the rear, to prevent any interruption from the enemy. The greatest disaster that can happen, is when the columns are attacked in detail, and before their junction.

NOTE

One great advantage which results from rallying your columns on a point far removed from the field of battle, or from the position previously occupied, is, that the enemy is uncertain as to the direction you mean to take.

If he divides his force to pursue you, he exposes himself to see his detachments beaten in detail, especially if you have exerted all due diligence, and have effected the junction of your troops in sufficient time to get between his columns and disperse them one after the other.

It was by a manœuvre of this kind in the campaign of Italy, in 1799, that General Melas gained the battle of Genola.

General Championet commanded the French army, and endeavored to cut off the communication of the Austrians with Turin, by employing corps which manœuvred separately to get into their rear. Melas, who divined his project, made a retrograde march, by which he persuaded his adversary he was in full retreat, although the real object of his movement was to concentrate his forces at the point fixed for the junction of the different detachments of the French army, and which he beat and dispersed, one after another, by his great superiority in numbers. The result of this manœuvre, in which the Austrian general displayed vigor, decision, and foresight, secured to him the peaceable possession of Piedmont.

It was also by the neglect of this principle that General Beaulieu, who commanded the Austro-Sardinian army in the campaign of 1796, lost the battle of Milesimo after that of Montenotte.

His object, in endeavoring to rally his different corps upon Milesimo, was, to cover the high roads of Turin and Milan; but Napoleon, aware of the advantages arising from the ardor of troops emboldened by recent success, attacked him before he could assemble his divisions, and, by a series of skilful manœuvres, succeeded in separating the combined armies. They retired in the greatest disorder – the one by the road of Milan, the other by that of Turin.

MAXIM XXVIII

No force should be detached on the eve of a battle, because affairs may change during the night, either by the retreat of the enemy, or by the arrival of large reinforcements to enable him to resume the offensive, and counteract your previous arrangements.

NOTE

In 1796, the army of the Sambre and Meuse, commanded by General Jourdan, effected a retreat, which was rendered still more difficult by the loss of his line of communication. Seeing, however, that the forces of the archduke Charles were scattered, Jourdan, in order to accomplish his retreat upon Frankfort, resolved to open himself a way by Wurtzburg, where there were at that moment only two divisions of the Austrian army. This movement would have been attended with success, if the French general, believing he had simply these two divisions to contend with, had not committed the error of separating himself from the corps of Lefevre – which he left at Schweinfurt to cover the only direct communication of the army with its base of operation.

The commission of this fault at the outset, added to some slowness in the march of the French general, secured the victory to the archduke, who hastened to concentrate his forces.

The arrival of the two divisions, also, of Kray and Wartesleben, during the battle, enabled him to oppose fifty thousand men to the French army, which scarcely numbered thirty thousand combatants. This last was consequently beaten, and obliged to continue its retreat by the mountains of Fuldes, where the badness of the roads could be equalled only by the difficulty of the country.

The division of Lefevre, amounting to fourteen thousand men, would, in all probability, have turned the scale in favor of Jourdan, had the latter not unfortunately conceived that two divisions only were opposing his passage to Wurtzburg.

MAXIM XXIX

When you have resolved to fight a battle, collect your whole force. Dispense with nothing. A single battalion sometimes decides the day.

NOTE

I think it here desirable to observe, that it is prudent before a battle to fix upon some point in rear of the reserve for the junction of the different detachments; for if, from unforeseen circumstances, these detachments should be prevented from joining before the action has commenced, they might be exposed, in case a retrograde movement should be found necessary, to the masses of the enemy. It is desirable also to keep the enemy in ignorance of these reinforcements, in order to employ them with greater effect. “A seasonable reinforcement,” says Frederick, “renders the success of a battle certain, because the enemy will always imagine it stronger than it really is, and lose courage accordingly.”

MAXIM XXX

Nothing is so rash or so contrary to principle, as to make a flank march before an army in position, especially when this army occupies heights at the foot of which you are forced to defile.

NOTE

It was by a neglect of this principle that Frederick was beaten at Kollin in the first campaign of 1757. Notwithstanding prodigies of valor, the Prussians lost fifteen thousand men and a great portion of their artillery, while the loss of the Austrians did not exceed five thousand men. The consequence of this battle was more unfortunate still, since it obliged the King of Prussia to raise the siege of Prague, and to evacuate Bohemia.

It was also by making a flank march before the Prussian army, that the French lost the disgraceful battle of Rosbach.

This imprudent movement was still more to be reprehended, because the Prince de Soubise, who commanded the French army, was so negligent as to manœuvre, without either advanced guards or flanking corps, in presence of the enemy. The result was, that his army, consisting of fifty thousand men, was beaten by six battalions and thirty squadrons. The French lost seven thousand men, twenty-seven standards, and a great number of cannon. The Prussians had only three hundred men disabled.

Thus, by having forgotten this principle, that a flank march is never to be made before an enemy in line of battle, Frederick lost his army at Kollin; and Soubise, at Rosbach, lost both his army and his honor.

MAXIM XXXI

When you determine to risk a battle, reserve to yourself every possible chance of success, more particularly if you have to deal with an adversary of superior talent; for if you are beaten, even in the midst of your magazines and your communications, wo to the vanquished!

NOTE

“We should make war,” says Marshal Saxe, “without leaving anything to hazard, and in this especially consists the talent of a general. But when we have incurred the risk of a battle, we should know how to profit by the victory, and not merely content ourselves, according to custom, with possession of the field.”

It was by neglecting to follow up the first success, that the Austrian army, after gaining the field of Marengo, saw itself compelled on the following day to evacuate the whole of Italy.

General Melas, observing the French in retreat, left the direction of the movements of his army to the chief of his staff, and retired to Alexandria to repose from the fatigues of the day. Colonel Zach, equally convinced with his general that the French army was completely broken, and consisted only of fugitives, formed the divisions in column of route.

By this arrangement, the imperial army prepared to enter upon its victorious march in a formation not less than three miles in depth.

It was near four o’clock when General Desaix rejoined the French army with his division. His presence restored in some degree an equality between the contending forces; and yet Napoleon hesitated for a moment whether to resume the offensive, or to make use of this corps to secure his retreat. The ardor of the troops to return to the charge, decided his irresolution. He rode rapidly along the front of his divisions, and addressing the soldiers – “We have retired far enough for to-day,” said he; “you know I always sleep upon the field of battle!”

The army, with unanimous shout, proclaimed to him a promise of victory. Napoleon resumed the offensive. The Austrian advance guard, panic-struck at the sight of a formidable and unbroken body presenting itself suddenly at a point where, a few moments before, only fugitives were to be seen, went to the right about, and carried disorder into the mass of its columns. Attacked immediately afterward, with impetuosity, in its front and flanks, the Austrian army was completely routed.

Marshal Daun experienced nearly the same fate as General Melas, at the battle of Torgau, in the campaign of 1760.

The position of the Austrian army was excellent. It had its left upon Torgau, its right on the plateau of Siptitz, and its front covered by a large sheet of water.

Frederick proposed to turn its right in order to make an attack upon the rear. For this purpose he divided his army into two corps, the one under the orders of Ziethen, with instructions to attack in front, following the edge of the water; the other under his own immediate command, with which he set out to turn the right of the Austrians. But Marshal Daun having had intimation of the movements of the enemy, changed his front by countermarching, and was thus enabled to repel the attacks of Frederick, whom he obliged to retreat. The two corps of the Prussian army had been acting without communication. Ziethen, in the meantime, hearing the fire recede, concluded that the king had been beaten, and commenced a movement by his left in order to rejoin him; but falling in with two battalions of the reserve, the Prussian general profited by this reinforcement to resume the offensive. Accordingly he renewed the attack with vigor, got possession of the plateau of Siptitz, and soon after of the whole field of battle. The sun had already set when the King of Prussia received the news of this unexpected good fortune. He returned in all haste, took advantage of the night to restore order in his disorganized army, and the day after the battle occupied Torgau.

Marshal Daun was receiving congratulations upon his victory, when he heard that the Prussians had resumed the offensive. He immediately commanded a retreat, and at daybreak the Austrians repassed the Elbe with the loss of twelve thousand men, eight thousand prisoners, and forty-five pieces of cannon.